The Order contains multiple procedural and arithmetic traps that can increase employer costs or create administrative exposure if not observed precisely.
Default and substitution rules that increase premiums: If an employer fails to furnish returns, the Order permits substitution of higher values. Schedule 1 cl 9(2) takes the estimate of wages to be the immediately preceding equivalent period’s wages multiplied by 1.3 if returns are missing. Schedule 5 cl 1(2) allows the insurer to determine W1 from the sum of Wa…Wn if the employer fails to supply the required notice at renewal. Schedule 8 cl 2(2) deems input tax credit entitlement to be 100% if an employer fails to notify ITC entitlement as required, which in Schedule 8 cl 1 maps to the B% table where 100% ITC corresponds to Nil discount relative to 100% ITC , in other words the employer loses potential reductions for having lower ITC entitlements.
Caps that substitute different expressions: The experience adjusted premium is subject to caps tied to T − A bands (cl 3(2)-(3)), and Schedule 8 contains parallel rules replacing E with capped substitutes in the ITC adjustment formula. These substitution rules can be non‑intuitive and must be checked carefully: the cap is assessed on the basic tariff premium less apprentice incentive amounts, or on the group sum TG − AG if the employer is a group member (cl 3(2)-(3)). Practitioners should run both bounded and unbounded calculations to see which applies.
Group aggregation effects: If an employer is a member of a group, many thresholds and factors are aggregated across group members , for size classification (Schedule 1 cl 2(3)), caps based on TG and AG (cl 3(3)), and experience factor calculations (Schedule 4 cl 2). A single member’s transfer or cessation can materially change another member’s E and S; Schedule 5 cl 3 contains a detailed formula for continuing employers when a departing member ceases operating. Group coordination is therefore essential, including consistent reporting of claims and wages.
Classification default to highest rate: If an employer does not supply sufficient information to enable classification, the business is classified in the class with the highest percentage rate appearing applicable (Schedule 3 cl 2(2) and Schedule 10 cl 2(1)). That default can materially increase T and therefore all subsequent calculations.
Motor vehicle and accommodation allowances complexity: Employers must choose between continuous recording and averaging methods for excluding motor vehicle allowances from wages (Schedule 1 cl 3-5). The averaging method requires an initial 12‑week recording and then applies percentages for up to four successive insurance periods, unless interrupted by Authority notice (Sch 1 cl 5). Failure to maintain these records means allowances will be included in wages, increasing premiums.
Minimum premium binds despite discount: The 3 per cent discount in cl 4 is mentioned but Schedule 6 cl 1-3 imposes a $175 minimum premium. A discounted premium cannot reduce below $175; Schedule 6 cl 3 expressly states pre‑discount premiums include any discount under cl 4.
Reporting of apprenticeship wages: The apprentice incentive amount (Schedule 10) requires proper classification and wage notice; Sch 10 cl 2(2) says if the employer has not supplied the required wage notice, A is taken to be zero. Thus failure to file notice forfeits the incentive.
Predecessor and self‑insurer carry‑forward: The Order treats predecessor history and prior self‑insurer status in ways that can surprise clients. Schedule 4 cl 4 includes predecessor periods in S calculations, and Schedule 4 cl 3 treats past self‑insurance periods as if insured. Employers acquiring a business or workforce must track predecessor claims and wages because they feed into S and E (Sch 1 cl 10; Sch 4 cl 4; Sch 5 cl 1(3)).
Authority discretion and lack of prescribed process: Several adjustment mechanisms depend on guidelines or criteria the Authority may issue (Schedule 4 cl 5; Schedule 7 cl 4). The Order does not set appeal routes for those administrative decisions; practitioners should anticipate guideline variability and the need to engage administratively.
Narrow temporal scope: The Order applies to policies taking effect within a precise one‑year window (Schedule 2 cl 1). If a policy straddles that window or is renewed or cancelled, different formulae may apply , Schedule 5 provides alternate E calculations for policies that have expired or for periods less than 12 months (Sch 5 cl 1(c)). Careful date tracking is required.
GST interactions: Input tax credit entitlement is a central variable in Schedule 8 and must be notified in accordance with regulatory clause 151. Misstating or failing to notify ITC entitlement changes the premium via the B% table; the mapping is non‑linear and can produce larger differences at the lower ITC bands (Schedule 8 cl 1 table).